Search for electroweak production of charginos and sleptons decaying to final states with two leptons and missing transverse momentum at Run II with the ATLAS detector

SUperSYmmetry (SUSY) is one of the most promising extensions of the Standard Model. Recent results from a search for the electroweak production of charginos and sleptons decaying into final states with two leptons (electrons and/or muons) are presented. They have been obtained on 139 $\text{fb}^{−1}$ proton-proton collisions recorded by the ATLAS detector at the Large Hadron Collider at $\sqrt{s}=13$ TeV. Three scenarios, based on simplified models, are considered: the production of lightest chargino pairs, followed by their decays into final states with leptons and the lightest neutralino via either sleptons or W bosons; direct production of slepton pairs, where each slepton decays directly into the lightest neutralino and a lepton. No significant deviations from the Standard Model expectations are observed and stringent limits at 95% confidence level are set on the masses of relevant supersymmetric particles in each of these scenarios.